Physics, 07.10.2019 17:30 maddie1776

Arock is thrown straight up with an initial velocity of 19.6 m/s. what time interval elapses between the rock’s being thrown and its return to the original launch point? (acceleration due to gravity is 9.80 m/s2 .)

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Answer from: kghmgfxn3292

4seconds

Explanation:

The time interval that elapses between the rock’s being thrown and its return to the original launch point is known as its time of flight.

Time of flight is the time taken for an object to spend in the air after launch.

Time of flight is represented mathematically as

T = 2Usin(theta)/g where;

U is the initial velocity of the object = 19.6m/s

theta = angle of inclination between the object launched and the ground = 90° (since the body is thrown vertically upward)

g = acceleration due to gravity = 9.8m/s²

Substituting this values in the formula above we have;

T = 2(19.6)sin90°/9.8

T = 2(19.6)(1)/9.8

T = 4seconds

Therefore the time interval that elapses between the rock’s being thrown and its return to the original launch point is 2seconds

Answer from: Quest

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

Answer from: Quest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

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Arock is thrown straight up with an initial velocity of 19.6 m/s. what time interval elapses between...

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